@dsyer Thanks dsyer I got the clarity why the response is not coming because it's implemented Implicit Grant Type

and we want to develop an application Which support billions of users request so which Grant Type We have to use and how to setup the flow for Authorization Server and Multiple resource server and it should support for Gaming and mobile application

@dsyer When I requested to this link "http://localhost:8081/oauth/token" with Form data and Header in PostmanI am getting the following response is{"error":"unsupported_grant_type","error_description":"Unsupported grant type: password"}For this Client I have grant_type password and refresh_token there in the database but still I am getting the above response why I didn't Understood

After adding the AuthenticationManager to the AuthorizationServerEndPoints The response coming as {"error":"invalid_grant","error_description":"Bad credentials"} Through UI I am able to login with same Credentials